Shrubs, erect. Branchlets slightly zigzag, pubescent and villous. Leaves simple; stipules lanceolate, hairy, deciduous; petiole 1.5-2.3 cm, sparsely villous; leaf blade ovate-cordate or broadly elliptic-cordate, 7-12 × 5-7.5 cm, papery, adaxially glabrous, abaxially glabrous except on veins, with scattered black glands, basal veins 5, lateral veins 5 or 6 pairs, margin slightly sinuate, apex mucronate. Inflorescences axillary or terminal, racemose, sometimes branched, slender, 2.5-4 cm, pubescent and villous, sparsely flowered; bracts ovate to ovate-lanceolate; peduncle short or absent. Flowers 0.6-1 cm. Calyx ca. 5 mm, densely pubescent, with yellowish glands; lobes lanceolate, longer than tube, apex long acuminate, lower one longest. Corolla purple, longer than calyx; standard circular, clawed, auriculate; wings oblong, clawed, one with toothlike auricle; keel falcate, wider than wings, clawed. Legume elliptic, ca. 10 × 6 mm, pubescent, with yellowish glands. Seeds 2, suborbicular. Fl. Jan-Apr, fr. Feb-May. 2n = ?18.
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